My 2005 500 now has almost 94K on the ODO and she still kicks ass - really, no major issues. The other day I couldn't find my key so I pulled out the spare from it's dungeon. To my surprise, it would not synch with the truck. I used the manual key to open the truck, the alarm came off as expected. However, I was able to start the truck - that was a second surprise to me because I thought these trucks would shut off the motor on any security breach until the alarm was properly turned off. First thought was that the keyfob battery was dead. I replaced it but the fob still would not activate any vehicle function. Obviously there's something wrong with the fob. What can be done? The darn thing has been sitting in my desk drawer for years, undisturbed. So how can it get bad? And, do I don't quite understand the motor shut off thingy when the alarm is on?